Term
Physical Change
[Definition]
[Examples] |
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Definition
A change that does not result in a new substance.
_______________________________
Phase changes (melting, evaporating, etc.), breaking into pieces, changing shape, mixing, dissolving, |
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Term
Chemical Change
[Definition]
[Examples] |
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Definition
A change that results in a new substance
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burning, rusting, cooking, corroding, frying, reacting, |
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Term
What are at least 3 examples of a
physical property?
________________________________________
What are at least 3 examples of a
chemical property?
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Definition
Examples:
mass, volume, density, color, shape, state,
_________________________________________
Examples:
flammability, rustability, corrosiveness, pH level |
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Term
Element
[Definition]
[Examples]
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Definition
A pure substance containing one kind of atom. Represented by a chemical symbol (one or two letters)
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Hydrogen, Helium, Oxygen, Nitrogen, and over 100 others. |
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Term
Compound
[Definition]
[Examples]
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Definition
A substance containing two or more elements that have been bonded together.
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water, salt, sugar, carbon dioxide,
and trillions of others. |
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Term
Mixtures
[Definition]
[Examples] |
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Definition
contains two or more elements/compounds that are mixed but not bonded together.
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salt water, living things and foods, metal alloys (steel, bronze), solutions, suspensions |
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Term
Acids
[Definition]
[Properties]
[Examples] |
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Definition
A substance with a pH below 7.
(lower = stronger)
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reacts with bases, sour taste, corrosive to some metals, turns indicators red
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Lemon juice, vinegar, anything with "acid" in its name |
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Term
Bases
[Definition]
[Properties]
[Examples] |
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Definition
A substance with a pH above 7
(higher = stronger)
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reacts with acids, bitter taste, slippery feel, turns indicators blue
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baking soda, soaps, |
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Term
Neutrals
[Definition]
[Examples] |
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Definition
A substance with a pH of 7
Neither an acid or base
Results when acids and bases are mixed
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water, salt, sugar, elements |
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